I am really delighted to host this guest blog in our narratives from Professor Corinna Hawkes, Director of the Centre for Food Policy at City, University of London. In it, Corinna explores a theme that I find powerful: that health is an outcome of multiple systems and interacting processes. Leaders need to appreciate the value of seeing the global challenges that COVID-19 presents in terms of multiple interconnected systems, all inter-dependent. Seeing the world in this way is a critical element of our thinking at 4SD. I hope you get as much from Corinna’s blog as I did.” – Dr David Nabarro.